xref: /minix3/minix/lib/libmthread/global.h (revision 433d6423c39e34ec4b79c950597bb2d236f886be)
1 /* EXTERN should be extern, except for the allocate file */
2 #ifdef ALLOCATE
3 #undef EXTERN
4 #define EXTERN
5 #endif
6 
7 #include <assert.h>
8 #include <sys/types.h>
9 #include <sys/signal.h>
10 
11 #define MTHREAD_RND_SCHED	0	/* Enable/disable random scheduling */
12 #define NO_THREADS 4
13 #define MAX_THREAD_POOL 1024
14 #define STACKSZ 4096
15 #define MAIN_THREAD (-1)
16 #define NO_THREAD (-2)
17 #define isokthreadid(i)	(i == MAIN_THREAD || (i >= 0 && i < no_threads))
18 #define MTHREAD_INIT_MAGIC 0xca11ab1e
19 #define MTHREAD_NOT_INUSE  0xdefec7
20 
21 typedef enum {
22   MS_CONDITION, MS_DEAD, MS_EXITING, MS_MUTEX, MS_RUNNABLE, MS_NEEDRESET
23 } mthread_state_t;
24 
25 struct __mthread_tcb {
26   mthread_thread_t m_tid;		/* My own ID */
27   mthread_state_t m_state;		/* Thread state */
28   struct __mthread_attr m_attr;		/* Thread attributes */
29   struct __mthread_cond *m_cond;	/* Condition variable that this thread
30   					 * might be blocking on */
31   void *(*m_proc)(void *);		/* Procedure to run */
32   void *m_arg;				/* Argument passed to procedure */
33   void *m_result;			/* Result after procedure returns */
34   mthread_cond_t m_exited;		/* Condition variable signaling this
35   					 * thread has ended */
36   mthread_mutex_t m_exitm;		/* Mutex to accompany exit condition */
37   ucontext_t m_context;			/* Thread machine context */
38   struct __mthread_tcb *m_next;		/* Next thread in linked list */
39 };
40 typedef struct __mthread_tcb mthread_tcb_t;
41 
42 EXTERN mthread_thread_t current_thread;
43 EXTERN mthread_queue_t free_threads;
44 EXTERN mthread_queue_t run_queue;		/* FIFO of runnable threads */
45 EXTERN mthread_tcb_t **threads;
46 EXTERN mthread_tcb_t mainthread;
47 EXTERN int no_threads;
48 EXTERN int used_threads;
49 EXTERN int need_reset;
50 EXTERN int running_main_thread;
51 
52